Abstract Photovoltaic irrigation has been widely used in many areas without conventional energy sources. In order to solve the problem of unstable operation and poor uniformity caused by diurnal variation solar radiation, a photovoltaic direct-drive water-saving system with automatic regulation was proposed. By using control technology method zonal rotation irrigation, all electric generated pa...

it is expected that residential units may replace   traditional heat and power production systems with cogeneration ones. among the different cogeneration systems, fuel cell based systems are a suitable choice due to their high efficiency, high power density, low emission and low noise. in this paper, a cogeneration system based on solid oxide fuel cells is examined. the system, including the f...

Solar energy availability and high installation costs of photovoltaic system encourage to extract maximum power from solar radiation. Since conventional methods cannot differentiate change in power due to perturb voltage and changing weather condition, these algorithms are prone to change under varying climatic conditions. The proposed system presents the high efficiency maximum power point tra...

We investigate the one-parameter Calabi-Yau models and identify families of D5-branes which are associated to lines embedded in these manifolds. The moduli spaces are given by sets of Riemann curves, which form a web whose intersection points are described by permutation branes. We arrive at a geometric interpretation for bulk-boundary correlators as holomorphic differentials on the moduli spac...

<span>Maximum power point tracking (MPPT)</span><span> is considered one of the important factors in minimizing installation costs and improving efficiency any photovoltaic water pumping system. The MPPT controller specifically used to extract maximum available from </span><span>photovoltaic (PV) array. can be achieved by using a specific algorithm. This work aims ...

A photovoltaic/thermal system (PV/T) was investigated experimentally using silicon carbide nanofluid as a cooling fluid. PV/T tested in Oman with 0.5 wt.% of nanoparticles terms thermophysical properties, performance parameters, and efficiencies. At 25 °C, it found that there is an increase the fluid’s thermal conductivity, density, viscosity up to 6.64%, 13%, 12%, respectively. When examining ...